An application method and structure of LED lamp based on common anode negative voltage circuit

Abstract

The invention discloses an application method and structure of an LED lamp based on a common anode negative voltage circuit, and relates to the technical field of LED fault detection. The application method of an LED lamp based on a common anode negative voltage circuit includes acquiring a test data set, performing a qualification test on a display screen based on the test data set; acquiring LED lamp reference data for a display screen of an LED lamp that has passed the test and applied a common anode negative voltage circuit, and establishing a normal operation database of an LED lamp; real-time monitoring of the LED lamps of the display screen of an LED lamp that has passed the test and applied a common anode negative voltage circuit, and verifying the operation status of each LED lamp based on the normal operation database of an LED lamp; if an LED lamp has an abnormal operation, an alarm is issued based on a set alarm mechanism, which solves the problem that the existing display screen is inconvenient to reduce energy consumption and heat based on a common anode negative voltage LED, and is inconvenient to judge the quality of the lamp based on current changes, and to perform real-time monitoring and fault warning.

Description

Technical Field

[0001] The present invention relates to the technical field of LED fault detection, and in particular to an application method and structure of an LED lamp based on a common anode negative voltage circuit. Background Art

[0002] During the factory production process of RGBLED display screens, all RGBLED lights on the RGBLED display screen need to be functionally tested to ensure the quality of the product. The traditional detection method uses a test tool to light up each RGBLED light separately, and relies on the naked eye recognition of the inspector to determine whether the RGBLED light is good or not. The method of relying on human naked eye recognition to judge whether the LED light is good or bad has the following main disadvantages: high cost, because it relies on the naked eye recognition of the inspector, it wastes manpower and increases factory costs; low efficiency, the inspector judges the quality by naked eye, and then switches to the recognition of the next LED light, which is very inefficient; low accuracy, the manual judgment method will lead to misjudgment after long-term work due to thinking inertia and personnel fatigue.

[0003] A Chinese patent application with publication number CN108469591A discloses a method and system for detecting an RGBLED display screen, which obtains an image of an LED lamp on the RGBLED display screen, and analyzes the position information and image information corresponding to the LED lamp in the LED lamp image; queries a standard image information corresponding to the position information in a standard database according to the position information of the LED lamp; compares the image information of the LED lamp with the standard image information, and determines whether the LED lamp has passed the test according to the comparison result, thereby realizing rapid and high-precision detection of the RGBLED display screen.

[0004] The Chinese patent application with publication number CN114675155A discloses a method, device, equipment and computer-readable storage medium for detecting an LED display screen, including sending a transfer drive instruction to a target microchip via a data line; the transfer drive instruction causes the target microchip to send a start instruction to an execution microchip on the same daisy chain along an address line; the start instruction causes the execution microchip to send a lighting instruction to the corresponding LED lamp bead; collects LED lighting information within the first preset time period after sending the lighting instruction; and determines LED fault information based on the LED lighting information. The present invention utilizes the characteristics of the microchip that can actively generate and send signals, and uses the target microchip to issue execution instructions to other microchips. One action can check the connection between the three structures, which can greatly improve the detection efficiency and speed. At the same time, it can also improve the degree of freedom of detection, and complex target detection can be achieved through simple customization.

[0005] However, existing display screens have the problem of not being able to reduce energy consumption and heat based on common anode negative voltage LEDs, and not being able to judge the quality of lamps based on current changes, and not being able to conduct real-time monitoring and fault warnings. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides an application method and structure of an LED lamp based on a common anode negative voltage circuit, which solves the problem that the existing display screen is inconvenient to reduce energy consumption and heat based on a common anode negative voltage LED, and it is inconvenient to judge the quality of the lamp based on current changes, and to perform real-time monitoring and fault warning.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a method for applying LED lamps based on a common anode negative voltage circuit, comprising the following steps: obtaining a test data set of a display screen of an LED lamp applying a common anode negative voltage circuit, and performing a qualification test on the display screen based on the test data set; obtaining LED lamp reference data of the display screen of the LED lamp applying a common anode negative voltage circuit that has passed the test, and establishing a normal operation database of LED lamps; real-time monitoring of the LED lamps of the display screen of the LED lamp applying a common anode negative voltage circuit that has passed the test, and verifying the operating status of each LED lamp based on the normal operation database of the LED lamps; if the LED lamp has an operating abnormality, an alarm is issued based on the set alarm mechanism.

[0008] Furthermore, the test data set includes display brightness characteristic data, display operating temperature data and display energy consumption data; the process of performing a qualification test on the display based on the test data set is as follows: according to the set test cycle, obtain the test data set in each test cycle; according to the set test cycle, obtain the corresponding test parameter data set for each test cycle, and the test parameter data includes display brightness test parameter characteristic data, display operating temperature test parameter data and display energy consumption test parameter data; based on the test data set and the test parameter data set, evaluate the operating status of the display in each test cycle to obtain a test operation evaluation index; compare the test operation evaluation index of the display in each test cycle with the set operation evaluation threshold corresponding to each test cycle, if the test operation evaluation index is greater than the operation evaluation threshold of the corresponding test cycle, the display fails to operate qualified in the test cycle; when the test operation evaluation index of each test cycle is less than the corresponding operation evaluation threshold of each test cycle, the display is qualified.

[0009] Furthermore, the calculation formula of the test operation evaluation index is as follows:

[0010]

[0011] Where i is the number of the test cycle, i = 1, 2, 3, ..., n, n is the total number of test cycles, j is the number of sampling times in each test cycle, j = 1, 2, 3, ..., m, m is the total number of sampling times in each test cycle, CpZ i is the test operation evaluation index of the oth test cycle, A1 is the display brightness characteristic data, A2 is the display brightness test parameter characteristic data, f(A1, A2) is the calculation function of the display brightness characteristic data and the display brightness test parameter characteristic data, α1 is the weight factor of the value of the calculation function f(A1, A2), Tc ij Tcd is the display screen operating temperature sampled at the jth sampling time in the ith test cycle in the display screen operating temperature data. ij Nc is the display screen operating parameter temperature corresponding to the display screen operating temperature sampled at the jth sampling time in the i-th test cycle in the display screen operating temperature test parameter data, ij Ncd is the display energy consumption sampled at the jth sampling time in the i-th test cycle in the display operating temperature data. ij is the display screen energy consumption parameter measurement corresponding to the display screen operating temperature sampled at the jth sampling time in the ith test cycle in the display screen operating temperature test parameter data, and α2 is the comprehensive weight factor of temperature and energy consumption.

[0012] Furthermore, the process of establishing a normal operation database of LED lamps is as follows: adjust the brightness of the LED lamp and obtain the photosensory current of the photodiode in real time; divide the brightness interval of the LED lamp based on the change of the photosensory current, and in any of the brightness intervals, the value of the photosensory current is the same; obtain the RGB values ​​corresponding to each brightness value in the brightness interval and establish an RGB data set; establish a normal operation database of LED lamps in which the photosensory current, brightness interval and RGB data set are mapped to each other.

[0013] Furthermore, the RGB data set also includes a test voltage value of each LED light-emitting unit corresponding to each RGB value and a test thermal current corresponding to each LED light-emitting unit generating heat, which is collected by a thermal diode.

[0014] Furthermore, the process of verifying the operating status of each LED lamp based on the normal operating database of LED lamps is as follows: obtaining the photosensitive current corresponding to each LED lamp and the RGB value of each LED lamp under the actual operating status of the display screen, wherein the photosensitive current is measured by a photodiode; matching the brightness interval corresponding to the photosensitive current from the normal operating database of LED lamps based on the obtained photosensitive current; matching the RGB data set corresponding to the brightness interval from the normal operating database of LED lamps based on the obtained brightness interval, wherein the RGB data set includes the RGB values ​​corresponding to each brightness value within the brightness interval; traversing the obtained RGB data set, and judging whether the obtained RGB value exists in the RGB data set: if the obtained RGB value exists in the RGB data set, the operating status of the LED lamp is normal; if the obtained RGB value exists in the RGB data set, the operating status of the LED lamp is normal; If the GB value does not exist in the RGB data set, the actual voltage value of each light-emitting unit of the LED lamp corresponding to the RGB value and the actual thermal current corresponding to each light-emitting unit are obtained, and the actual thermal current is collected by the thermistor corresponding to each light-emitting unit of the LED; the actual voltage value of each light-emitting unit of the LED lamp corresponding to the RGB value and the actual thermal current corresponding to each light-emitting unit, as well as the test voltage value of each light-emitting unit of the LED corresponding to the RGB value and the test thermal current corresponding to each light-emitting unit of the LED collected by the thermistor when heating are fused and analyzed to obtain the LED lamp operation evaluation index; if the LED lamp operation evaluation index is less than the set LED lamp operation threshold, the LED lamp is operating normally; if the LED lamp operation evaluation index is greater than the set LED lamp operation threshold, the LED lamp is operating abnormally.

[0015] Furthermore, the calculation formula of the LED lamp operation evaluation index is:

[0016] YpZ=ln(1+β1*f(B1, B2)+β2*f(C1, C2));

[0017] Wherein, YpZ is the LED lamp operation evaluation index, B1 is the actual voltage value, B2 is the test voltage value, f(B1, B2) is the calculation function of the actual voltage value and the test voltage value, β1 is the weight factor of the value of the calculation function f(B1, B2), C1 is the actual thermal current, C2 is the test thermal current, f(C1, C2) is the calculation function of the actual thermal current and the test thermal current, β2 is the weight factor of the value of the calculation function f(C1, C2).

[0018] Furthermore, if the LED lamp operation evaluation index is less than the set LED lamp operation threshold, the LED lamp is judged to be operating normally, and the brightness value of the LED lamp in actual use is obtained, and the corrected brightness interval is obtained based on the change of the photosensor current, and the RGB value corresponding to the brightness value of each LED lamp in the corrected brightness interval is obtained, and a corrected RGB data set is established, and the LED lamp normal operation database is updated based on the photosensor current, the corrected brightness interval and the corrected RGB data set.

[0019] A LED lamp structure based on a common anode negative voltage circuit includes a common anode negative voltage LED, a switching power supply, a controller and a collection module, wherein: the positive electrode of the common anode negative voltage LED is respectively connected to the switching power supply and the controller, the switching power supply is used to supply power to the positive electrode of the common anode negative voltage LED, and the controller is used to control whether the positive electrode of the common anode negative voltage LED is connected to the switching power supply; the negative electrode of the common anode negative voltage LED is respectively connected to the switching power supply and the controller, and the controller is used to control whether the negative electrode of the common anode negative voltage LED is connected to the switching power supply; the collection module is used to collect the photosensitive current and thermal current of each light-emitting unit of the common anode negative voltage LED.

[0020] Furthermore, the acquisition module includes a photodiode and a thermistor, the photodiode is used to collect the photosensitive current of each light-emitting unit of the common anode negative voltage LED, and the thermistor is used to collect the thermal current of each light-emitting unit of the common anode negative voltage LED.

[0021] The present invention has the following beneficial effects:

[0022] (1) The LED lamp application method based on the common anode negative voltage circuit can improve the detection accuracy of the display screen quality by carefully acquiring the brightness characteristic data, operating temperature data and energy consumption data of the display screen, and evaluating according to the set test cycle. It comprehensively considers the data of multiple aspects such as the brightness, temperature and energy consumption of the display screen, and comprehensively evaluates the operating status of the display screen, which can better reflect its actual operating conditions.

[0023] (2) The LED lamp application method based on the common anode negative voltage circuit can comprehensively record the luminous characteristics, voltage characteristics and thermal characteristics of the LED lamp at different brightness by obtaining the light-sensing current, RGB value and other test data, and provide detailed data support for the performance evaluation of the LED lamp. After the normal operation database of the LED lamp is established, the performance of the LED lamp at different brightness can be quickly found by querying parameters such as the light-sensing current and RGB value, and data visualization and rapid query can be realized. The luminous characteristics, voltage characteristics and thermal characteristics of the LED lamp can be analyzed to achieve quality control and performance optimization of the LED lamp, thereby improving the stability and reliability of the LED lamp.

[0024] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The present invention is a flow chart of the LED lamp application method based on the common anode negative voltage circuit.

[0026] Figure 2 This is a structural diagram of an LED lamp based on a common anode negative voltage circuit according to the present invention. DETAILED DESCRIPTION

[0027] The embodiments of the present application solve the problem that the existing display screen is inconvenient to reduce energy consumption and heat based on common anode negative voltage LED, and it is inconvenient to judge the quality of the lamp based on current changes, and to perform real-time monitoring and fault warning through the application method and structure of LED lamp based on common anode negative voltage circuit.

[0028] The overall idea of ​​the problem in the embodiment of this application is as follows:

[0029] First, obtain the test data set of the LED display screen and perform a qualification test on it to ensure that the LED display screen meets the quality standards. For the LED display screen that has passed the test, obtain the reference data of the LED lights, and establish a normal operation database for LED lights to record the normal operation status and parameters of the LED lights. Monitor the LED lights in the LED display screen in real time to ensure the normal operation of the LED lights. Based on the set alarm mechanism, analyze the operating status of the LED lights monitored in real time. If any abnormality is found in the LED lights, trigger the alarm in time and notify the relevant personnel to handle and repair them.

[0030] See also Figure 1 The embodiment of the present invention provides a technical solution: a method for applying an LED lamp based on a common anode negative voltage circuit, comprising the following steps: obtaining a test data set of a display screen of an LED lamp applying a common anode negative voltage circuit, and performing a qualification test on the display screen based on the test data set; obtaining LED lamp reference data of the display screen of the LED lamp applying a common anode negative voltage circuit that has passed the test, and establishing a normal operation database of LED lamps; real-time monitoring of the LED lamps of the display screen of the LED lamp applying a common anode negative voltage circuit that has passed the test, and verifying the operating status of each LED lamp based on the normal operation database of the LED lamps; if the LED lamp has an operating abnormality, an alarm is issued based on a set alarm mechanism.

[0031] Specifically, the test data set includes display brightness characteristic data, display operating temperature data and display energy consumption data; the process of performing a qualification test on the display based on the test data set is as follows: according to the set test cycle, obtain the test data set in each test cycle; according to the set test cycle, obtain the corresponding test parameter data set for each test cycle, the test parameter data includes display brightness test parameter characteristic data, display operating temperature test parameter data and display energy consumption test parameter data; based on the test data set and the test parameter data set, the operating status of the display in each test cycle is evaluated to obtain a test operation evaluation index; the test operation evaluation index of the display in each test cycle is compared with the set operation evaluation threshold corresponding to each test cycle, if the test operation evaluation index is greater than the operation evaluation threshold of the corresponding test cycle, the display fails to operate qualified in the test cycle; when the test operation evaluation index of each test cycle is less than the corresponding operation evaluation threshold of each test cycle, the display is qualified.

[0032] First, the display screen brightness, operating temperature, energy consumption and other data in each test cycle, as well as the corresponding test parameter data set, are obtained. Based on the obtained data, the test operation evaluation index of the display screen in each test cycle is calculated. The test operation evaluation index is used to indicate the similarity between the operating state of the display screen during the test and the set operating state. The smaller the value, the higher the similarity and the closer it is to the set standard. The test operation evaluation index comprehensively considers data in multiple aspects such as brightness, temperature and energy consumption. The evaluation index of each test cycle is compared with the set operation evaluation threshold. If the evaluation index is greater than the threshold, the display screen is judged to be unqualified in the cycle; if the evaluation index of all test cycles is less than the threshold, the display screen is judged to be qualified.

[0033] By carefully acquiring the display's brightness characteristic data, operating temperature data, and energy consumption data, and evaluating it according to the set test cycle, the accuracy of display quality detection can be improved. By comprehensively considering multiple aspects of the display's brightness, temperature, energy consumption, etc., a comprehensive evaluation of the display's operating status can be conducted, which can better reflect its actual operating conditions.

[0034] In addition to obtaining the test operation evaluation index by testing and evaluating the display operation process through professional display detection equipment, the test operation evaluation index can also be obtained through the following calculation formula:

[0035]

[0036] Where i is the number of the test cycle, i = 1, 2, 3, ..., n, n is the total number of test cycles, j is the number of sampling times in each test cycle, j = 1, 2, 3, ..., m, m is the total number of sampling times in each test cycle, CpZ i is the test operation evaluation index of the i-th test cycle, A1 is the display brightness characteristic data, A2 is the display brightness test parameter characteristic data, f(A1, A2) is the calculation function of the display brightness characteristic data and the display brightness test parameter characteristic data, α1 is the weight factor of the value of the calculation function f(A1, A2), Tc ij Tcd is the display screen operating temperature sampled at the jth sampling time in the ith test cycle in the display screen operating temperature data. ij Nc is the display screen operating parameter temperature corresponding to the display screen operating temperature sampled at the jth sampling time in the i-th test cycle in the display screen operating temperature test parameter data, ij Ncd is the display energy consumption sampled at the jth sampling time in the i-th test cycle in the display operating temperature data. ij is the display screen energy consumption parameter measurement corresponding to the display screen operating temperature sampled at the jth sampling time in the ith test cycle in the display screen operating temperature test parameter data, and α2 is the comprehensive weight factor of temperature and energy consumption.

[0037] Firstly, by using the display screen brightness characteristic data and the display screen brightness test parameter characteristic data, a value reflecting the brightness characteristic is obtained by calculating the function f(A1, A2).

[0038] For each sampling j in each test cycle i, calculate the display operating temperature data Tci j And the corresponding test parameter data Tcd ij The relative difference between the display and the display energy consumption data Nc ij And the corresponding test parameter data Ncd ij The relative difference between them is then added together to achieve a comprehensive calculation of temperature and energy consumption.

[0039] The brightness characteristic calculation results and the temperature and energy consumption comprehensive calculation results are weighted and summed according to the weight factor to obtain the test operation evaluation index, which is used to evaluate the operating status of the display screen during the test cycle.

[0040] Taking into account multiple factors such as the brightness, temperature and energy consumption of the display screen, it can more comprehensively evaluate the operating status of the display screen. By adjusting the weight factor, the importance of different factors in the evaluation index can be adjusted to make the evaluation index more in line with specific quality control needs. The calculation process of this evaluation index is automated, which improves the efficiency and real-time nature of the evaluation, and helps to detect problems in a timely manner and take corresponding measures.

[0041] The display brightness characteristic data includes the LED average brightness accuracy, the LED brightness adjustment average response time, the LED color temperature and the LED color uniformity. The display brightness test parameter characteristic data includes the LED parameter average brightness accuracy, the LED brightness adjustment parameter average response time, the LED parameter color temperature and the LED parameter color uniformity. The calculation function f(A1, A2) can be a similarity calculation function, such as cosine similarity, or it can be the following calculation formula:

[0042]

[0043] In the formula, LZ ij is the average brightness accuracy of the LED sampled at the jth sampling time in the ith test cycle, LzC is the average brightness accuracy of the LED parameters, Tx ij is the average response time of the LED brightness adjustment sampled at the jth sampling time in the i-th test cycle, TxC is the average response time of the LED brightness adjustment parameter, HZ ij is the LED color temperature sampled at the jth sampling time in the ith test cycle, HzC is the LED parameter color temperature, KZ ij is the LED color uniformity sampled at the jth sampling time in the ith test cycle, KzC is the LED parameter color uniformity, and e is a natural constant.

[0044] First, the characteristics of the display screen are evaluated in terms of LED average brightness accuracy, LED brightness adjustment average response time, LED color temperature, and LED color uniformity. Then, these characteristic data are compared with the corresponding test parameter characteristic data to calculate their differences.

[0045] The calculation function consists of two parts. One is an exponential function based on the average brightness accuracy of the LED and the average response time of the LED brightness adjustment. The other is an inverse tangent function based on the LED color temperature and the LED color uniformity. These two functions take into account the importance and relationship between different features, as well as the deviation between the test data and the parameter data.

[0046] By considering multiple features such as LED average brightness accuracy, LED brightness adjustment average response time, LED color temperature, and LED color uniformity, the overall performance of the display screen is evaluated, making the evaluation more comprehensive. The weight part (exponential function and inverse tangent function) in the calculation function is adjustable, so that the impact of different features on the evaluation results can be adjusted according to actual conditions, thereby improving the flexibility and applicability of the evaluation. The calculation function takes into account the relationship between features, such as the impact of LED average brightness accuracy and LED brightness adjustment average response time, making the evaluation more accurate.

[0047] Specifically, the process of establishing a normal operation database of LED lamps is as follows: adjust the brightness of the LED lamp and obtain the photosensory current of the photodiode in real time; divide the brightness interval of the LED lamp based on the change of the photosensory current, and the value of the photosensory current is the same in any brightness interval; obtain the RGB values ​​corresponding to each brightness value in the brightness interval and establish an RGB data set; establish a normal operation database of LED lamps in which the photosensory current, brightness interval and RGB data set are mapped to each other.

[0048] The RGB data set also includes the test voltage value of each LED light-emitting unit corresponding to each RGB value and the test thermal current corresponding to the heat generated by each LED light-emitting unit collected by the thermal diode.

[0049] In this embodiment, the brightness of the LED lamp is adjusted to observe the change of its photosensitive current at different brightness. Since the photodiode has a certain detection accuracy, the change of brightness to a certain extent may not cause the change of the photosensitive current. Therefore, the brightness is divided based on the change of the photosensitive current to obtain the brightness interval. In any brightness interval, the value of the photosensitive current is the same, which can ensure that the LED lamp has similar light-sensitive characteristics in the same brightness interval. For each brightness interval, the RGB value corresponding to each brightness value therein is obtained, so that an RGB data set of the LED lamp at different brightness can be established to record the luminous color characteristics of the LED lamp at different brightness. The photosensitive current, brightness interval and RGB data set are mapped to each other to establish a normal operation database of the LED lamp, so that the corresponding brightness interval, the corresponding test voltage value and the test thermal current can be easily queried according to the photosensitive current or RGB value of the LED lamp.

[0050] By acquiring light-sensing current, RGB values ​​and other test data, the luminous characteristics, voltage characteristics and thermal characteristics of LED lamps at different brightness can be fully recorded, providing detailed data support for the performance evaluation of LED lamps. After the normal operation database of LED lamps is established, the performance of LED lamps at different brightness can be quickly found by querying parameters such as light-sensing current and RGB values, realizing data visualization and quick query. The luminous characteristics, voltage characteristics and thermal characteristics of LED lamps can be analyzed to achieve quality control and performance optimization of LED lamps, thereby improving the stability and reliability of LED lamps.

[0051] Specifically, the process of verifying the operating status of each LED lamp based on the normal operating database of LED lamps is as follows: obtain the photosensory current corresponding to each LED lamp and the RGB value of each LED lamp under the actual operating status of the display screen, the photosensory current being measured by a photodiode; match the brightness interval corresponding to the photosensory current from the normal operating database of LED lamps based on the obtained photosensory current; match the RGB data set corresponding to the brightness interval from the normal operating database of LED lamps based on the obtained brightness interval, the RGB data set including the RGB values ​​corresponding to each brightness value within the brightness interval; traverse the obtained RGB data set to determine whether the obtained RGB value exists in the RGB data set: if the obtained RGB value exists in the RGB data set, the operating status of the LED lamp is normal; if the obtained RGB value exists in the RGB data set, the operating status of the LED lamp is normal; If the value does not exist in the RGB data set, the actual voltage value of each light-emitting unit of the LED lamp corresponding to the RGB value and the actual thermal current corresponding to each light-emitting unit are obtained, and the actual thermal current is collected by the thermistor corresponding to each light-emitting unit of the LED; the actual voltage value of each light-emitting unit of the LED lamp corresponding to the RGB value and the actual thermal current corresponding to each light-emitting unit, as well as the test voltage value of each light-emitting unit of the LED corresponding to the RGB value and the test thermal current corresponding to each light-emitting unit of the LED collected by the thermistor when heating are fused and analyzed to obtain the LED lamp operation evaluation index; if the LED lamp operation evaluation index is less than the set LED lamp operation threshold, the LED lamp is operating normally; if the LED lamp operation evaluation index is greater than the set LED lamp operation threshold, the LED lamp is operating abnormally.

[0052] Obtain the photosensitive current and RGB value of each LED lamp under the actual operation state of the display screen. According to the obtained photosensitive current, match the brightness interval corresponding to the photosensitive current in the normal operation database of the LED lamp. According to the obtained brightness interval, match the RGB data set corresponding to the brightness interval from the normal operation database of the LED lamp. The data set contains the RGB values ​​corresponding to each brightness value in the brightness interval. Traverse the obtained RGB data set to determine whether the obtained RGB value exists in the RGB data set. If it exists, the operation state of the LED lamp is considered normal. If not, proceed to the next step.

[0053] When the RGB value obtained does not exist in the RGB data set, the actual voltage value and thermal current of each light-emitting unit of the LED lamp corresponding to the RGB value and the test voltage value and test thermal current of each light-emitting unit of the LED lamp are fused and analyzed to obtain the LED lamp operation evaluation index, and the operation status of the LED lamp is judged according to the LED lamp operation evaluation index. If the LED lamp operation evaluation index is less than the set LED lamp operation threshold, the LED lamp is operating normally; if the LED lamp operation evaluation index is greater than the set LED lamp operation threshold, the LED lamp is operating abnormally.

[0054] This process uses databases and algorithms to realize automatic detection of the operating status of LED lights, reducing the possibility of human intervention and misjudgment. By automatically verifying the status of LED lights, efficiency can be improved and labor costs can be saved, helping to ensure the stability and reliability of LED light operation.

[0055] In order to obtain the LED lamp operation evaluation index, it can be obtained through photoelectric parameter monitoring, electrical parameter monitoring, etc., or through the following calculation formula:

[0056] YpZ=ln(1+β1*f(B1, B2)+β2*f(C1, C2));

[0057] Wherein, YpZ is the LED lamp operation evaluation index, B1 is the actual voltage value, B2 is the test voltage value, f(B1, B2) is the calculation function of the actual voltage value and the test voltage value, β1 is the weight factor of the value of the calculation function f(B1, B2), C1 is the actual thermal current, C2 is the test thermal current, f(C1, C2) is the calculation function of the actual thermal current and the test thermal current, β2 is the weight factor of the value of the calculation function f(C1, C2).

[0058] First, the actual voltage, test voltage, actual thermal current and test thermal current of the LED lamp are obtained, and the actual voltage value and the test voltage value, the actual thermal current and the test thermal current are processed using calculation functions f(B1, B2) and f(C1, C2) respectively to obtain the corresponding values. The values ​​obtained by the calculation function are weighted and summed according to the weight factors to comprehensively consider the influence of various parameters.

[0059] The result of the weighted sum is added with 1 and then the logarithm is taken to obtain the LED lamp operation evaluation index. The operation status of the LED lamp is judged according to the size of the evaluation index. The larger the evaluation index, the worse the operation status of the LED lamp; the smaller the evaluation index, the better the operation status of the LED lamp.

[0060] The evaluation index formula takes into account multiple parameters of LED lamps, including actual voltage, test voltage, actual thermal current and test thermal current. It can conduct a comprehensive and accurate evaluation of the operating status of LED lamps, which helps to promptly discover and solve problems with LED lamps and ensure their normal operation.

[0061] The calculation function f(B1, B2) can be determined by data fitting or theoretical derivation, including least squares fitting and theoretical model derivation, or can be obtained using the following calculation formula:

[0062] In the formula, Rv is the actual voltage value of the R light-emitting unit, RvC is the test voltage value of the R light-emitting unit, δ1 is the voltage deviation weight factor of the R light-emitting unit, Gv is the actual voltage value of the G light-emitting unit, GvC is the test voltage value of the G light-emitting unit, δ2 is the voltage deviation weight factor of the G light-emitting unit, Bv is the actual voltage value of the B light-emitting unit, BvC is the test voltage value of the B light-emitting unit, δ3 is the voltage deviation weight factor of the B light-emitting unit, and ΔPV is the allowable value of the deviation voltage.

[0063] According to the actual voltage value and the test voltage value, the voltage deviation of the three light-emitting units R, G, and B is calculated respectively, and the voltage deviation of each light-emitting unit is multiplied by the corresponding weight factor respectively, and the square root of the sum of the squares of the weighted voltage deviation is processed to obtain the total voltage deviation. The total voltage deviation is divided by the allowable value of the deviation voltage to obtain the standardized voltage deviation.

[0064] This calculation formula takes into account the voltage deviation of the three light-emitting units R, G, and B, and can comprehensively evaluate the status of each light-emitting unit of the LED lamp, rather than being limited to a single light-emitting unit. Through three weight factors, the influence of each light-emitting unit in the calculation can be adjusted according to its importance, making the evaluation more in line with the actual situation, making the voltage deviation evaluation of the LED lamp more comprehensive and accurate, and helping to discover and promptly deal with problems of each light-emitting unit in the LED lamp, thereby improving the quality and stability of the LED lamp.

[0065] The calculation function f(C1, C2) can be determined by data fitting or theoretical derivation, including least squares fitting and theoretical model derivation, and can also be obtained using the following calculation formula:

[0066] In the formula, Rw is the actual thermal current corresponding to the R light-emitting unit, RwC is the test thermal current corresponding to the R light-emitting unit, γ1 is the thermal current deviation weight factor of the R light-emitting unit, Gw is the actual thermal current corresponding to the G light-emitting unit, GwC is the test thermal current corresponding to the G light-emitting unit, γ2 is the thermal current deviation weight factor of the G light-emitting unit, Bw is the actual thermal current corresponding to the B light-emitting unit, BwC is the test thermal current corresponding to the B light-emitting unit, γ3 is the thermal current deviation weight factor of the B light-emitting unit, and ΔPW is the allowable value of the deviation thermal current.

[0067] According to the actual thermal-sensing current value and the tested thermal-sensing current value, the thermal-sensing current deviations of the three light-emitting units R, G, and B are calculated respectively. The thermal-sensing current deviations of each light-emitting unit are multiplied by the corresponding weight factors and summed up to obtain the square sum of the weighted thermal-sensing current deviations. The square root of the square sum of the weighted thermal-sensing current deviations is taken to obtain the total thermal-sensing current deviation. The total thermal-sensing current deviation is divided by the allowable value of the deviation thermal-sensing current to obtain the standardized thermal-sensing current deviation.

[0068] The calculation formula takes into account the thermal current deviation of the three light-emitting units R, G, and B. Through three weight factors, the influence of each light-emitting unit in the calculation can be adjusted according to its importance, making the thermal current deviation evaluation of the LED lamp more comprehensive and accurate, which helps to discover potential problems in advance and take corresponding measures to ensure the normal operation and safety of the LED lamp.

[0069] Specifically, if the LED lamp operation evaluation index is less than the set LED lamp operation threshold, the LED lamp is judged to be operating normally, and the brightness value of the LED lamp in actual use is obtained. The corrected brightness interval is obtained based on the change of the photosensor current, and the RGB values ​​corresponding to the brightness values ​​of each LED lamp in the corrected brightness interval are obtained. A corrected RGB data set is established, and the LED lamp normal operation database is updated based on the photosensor current, the corrected brightness interval and the corrected RGB data set.

[0070] In this embodiment, first, the operation evaluation index of the LED lamp is compared with the set LED lamp operation threshold to determine whether the operation status of the LED lamp is normal. If the operation evaluation index of the LED lamp is less than the set threshold, that is, the LED lamp is operating normally, then the brightness value of the LED lamp in actual use is obtained, which can be achieved through sensors or other optoelectronic devices. Based on the change of the photosensitive current, the corrected brightness range is determined, which can be obtained by comparing and correcting the photosensitive current value of the LED lamp in actual use with the previous data. Within the corrected brightness range, the RGB value corresponding to the brightness value of each LED lamp is obtained, and a corrected RGB data set is established, that is, the RGB color values ​​corresponding to the LED lamp at different brightness are recorded. Finally, based on the photosensitive current, the corrected brightness range and the corrected RGB data set, the normal operation database of the LED lamp is updated for subsequent reference and analysis.

[0071] By obtaining the corrected brightness range based on the change of photosensor current, the brightness performance of LED lamps in actual use can be more accurately reflected. Establishing a corrected RGB data set helps to record the color performance of LED lamps at different brightnesses. It can timely record the performance of LED lamps in actual use, provide basic data for subsequent color correction and adjustment, and provide important support for the daily management and maintenance of LED lamps.

[0072] An LED lamp structure based on a common anode negative voltage circuit, such as Figure 2As shown, it includes a common anode negative voltage LED, a switching power supply, a controller and a collection module, wherein: the positive electrode of the common anode negative voltage LED is respectively connected to the switching power supply and the controller, the switching power supply is used to supply power to the positive electrode of the common anode negative voltage LED, and the controller is used to control whether the positive electrode of the common anode negative voltage LED is connected to the switching power supply; the negative electrode of the common anode negative voltage LED is respectively connected to the switching power supply and the controller, and the controller is used to control whether the negative electrode of the common anode negative voltage LED is connected to the switching power supply; the collection module is used to collect the light-sensitive current and thermal-sensitive current of each light-emitting unit of the common anode negative voltage LED.

[0073] Specifically, the acquisition module includes a photodiode and a thermistor. The photodiode is used to collect the photosensitive current of each light-emitting unit of the common anode negative voltage LED, and the thermistor is used to collect the thermal current of each light-emitting unit of the common anode negative voltage LED.

[0074] In this embodiment, the controller controls the connection of the positive and negative electrodes of the LED through a switching power supply, thereby realizing the power supply control of the LED. The acquisition module includes a photodiode and a thermistor, which are used to respectively collect the light-sensing current and the thermal-sensing current of each light-emitting unit of the LED. The photodiode detects the light intensity, and the thermistor detects the temperature change when the LED is working. The photoelectric and thermistor in the acquisition module can provide real-time information of the LED working environment, such as light intensity and temperature, which can be used to analyze the performance, usage and health of the LED lamp, provide a reference basis for the optimization and improvement of the LED system, help monitor the working status of the LED lamp, and promptly discover and handle abnormal situations, thereby improving the stability and reliability of the LED system.

[0075] An electronic device comprises: a processor; and a memory, wherein computer program instructions are stored in the memory, and when the computer program instructions are executed by the processor, the processor executes the LED lamp application method based on the common anode negative voltage circuit as described above.

[0076] A computer-readable storage medium is used to store a program, and when the program is executed by a processor, the LED lamp application method based on the common anode negative voltage circuit as described above is implemented.

[0077] In summary, this application has at least the following effects:

[0078] By carefully acquiring the display's brightness characteristic data, operating temperature data, and energy consumption data, and evaluating it according to the set test cycle, the accuracy of display quality detection can be improved. By comprehensively considering multiple aspects of the display's brightness, temperature, energy consumption, etc., a comprehensive evaluation of the display's operating status can be conducted, which can better reflect its actual operating conditions.

[0079] By acquiring light-sensing current, RGB values ​​and other test data, the luminous characteristics, voltage characteristics and thermal characteristics of LED lamps at different brightness can be fully recorded, providing detailed data support for the performance evaluation of LED lamps. After the normal operation database of LED lamps is established, the performance of LED lamps at different brightness can be quickly found by querying parameters such as light-sensing current and RGB values, realizing data visualization and quick query. The luminous characteristics, voltage characteristics and thermal characteristics of LED lamps can be analyzed to achieve quality control and performance optimization of LED lamps, thereby improving the stability and reliability of LED lamps.

[0080] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0081] The present invention is described with reference to flowcharts and / or block diagrams of systems, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0082] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0083] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0084] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0085] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An LED lamp application method based on a common anode negative voltage circuit, characterized in that: The following steps are involved: Acquire a test data set of a display screen of an LED lamp using a common anode negative voltage circuit, and perform a qualification test on the display screen based on the test data set; The test data set includes display screen brightness characteristic data, display screen operating temperature data and display screen energy consumption data; The process of performing a display qualification test based on a test data set is as follows: According to the set test cycle, obtain the test data set in each test cycle; According to the set test cycle, the corresponding test parameter data set of each test cycle is obtained, wherein the test parameter data includes display screen brightness test parameter characteristic data, display screen operating temperature test parameter data and display screen energy consumption test parameter data; Based on the test data set and the test parameter data set, the operating status of the display screen in each test cycle is evaluated to obtain the test operation evaluation index; The test operation evaluation index of the display screen in each test cycle is compared with the operation evaluation threshold corresponding to each test cycle. If the test operation evaluation index is greater than the operation evaluation threshold of the corresponding test cycle, the display screen fails to operate in the test cycle; When the test operation evaluation index of each test cycle is less than the corresponding operation evaluation threshold of each test cycle, the display screen is qualified; The calculation formula of the test run evaluation index is as follows: Where i is the number of the test cycle, i = 1, 2, 3, ..., n, n is the total number of test cycles, j is the number of sampling times in each test cycle, j = 1, 2, 3, ..., m, m is the total number of sampling times in each test cycle, CpZ i is the test operation evaluation index of the i-th test cycle, A1 is the display brightness characteristic data, A2 is the display brightness test parameter characteristic data, f(A1, A2) is the calculation function of the display brightness characteristic data and the display brightness test parameter characteristic data, α1 is the weight factor of the value of the calculation function f(A1, A2), Tc ij Tcd is the display screen operating temperature sampled at the jth sampling time in the i-th test cycle in the display screen operating temperature data. ij Nc is the display screen operating parameter temperature corresponding to the display screen operating temperature sampled at the jth sampling time in the i-th test cycle in the display screen operating temperature test parameter data, ij Ncd is the display energy consumption sampled at the jth sampling time in the i-th test cycle in the display operating temperature data. ij is the display screen energy consumption parameter measurement corresponding to the display screen operating temperature sampled at the jth sampling number in the i-th test cycle in the display screen operating temperature test parameter data, and α2 is the comprehensive weight factor of temperature and energy consumption; Wherein, LZ is the LED average brightness accuracy, LzC is the LED parameter average brightness accuracy, Tx is the LED brightness adjustment average response time, TxC is the LED brightness adjustment parameter average response time, HZ is the LED color temperature, HzC is the LED parameter color temperature, KZ is the LED color uniformity, KzC is the LED parameter color uniformity, and e is a natural constant; Obtain LED lamp reference data from the LED lamp display screens that have passed the test and use the common anode negative voltage circuit, and establish a normal operation database for LED lamps; Monitor the LED lights of the display screens that have passed the test and applied the common anode negative voltage circuit in real time, and verify the operating status of each LED light based on the normal operation database of the LED lights; If the LED light operates abnormally, an alarm will be issued based on the set alarm mechanism.

2. The LED lamp application method based on the common anode negative voltage circuit according to claim 1, characterized in that: The process of establishing a normal operation database for LED lights is as follows: Adjust the brightness of the LED light and obtain the light-sensing current of the photodiode in real time; Dividing the brightness interval of the LED lamp based on the change of the light-sensing current, and in any of the brightness intervals, the value of the light-sensing current is the same; Get the RGB value corresponding to each brightness value in the brightness range and establish an RGB data set; Establish a normal operation database of LED lights that maps light-sensing current, brightness range and RGB data sets.

3. The LED lamp application method based on the common anode negative voltage circuit according to claim 2, characterized in that: The RGB data set also includes the test voltage value of each light-emitting unit of the LED corresponding to each RGB value and the test thermal current corresponding to the heat generated by each light-emitting unit of the LED collected by the thermal diode.

4. The LED lamp application method based on the common anode negative voltage circuit according to claim 1, characterized in that: The process of verifying the operating status of each LED lamp based on the normal operation database of the LED lamp is as follows: Obtaining the light-sensing current corresponding to each LED lamp and the RGB value of each LED lamp under the actual operating state of the display screen, wherein the light-sensing current is measured by a photodiode; Based on the obtained light sensing current, the brightness interval corresponding to the light sensing current is matched from the normal operation database of the LED lamp; Based on the acquired brightness interval, an RGB data set corresponding to the brightness interval is matched from the normal operation database of the LED lamp, wherein the RGB data set includes RGB values ​​corresponding to each brightness value within the brightness interval; Traverse the obtained RGB data set and determine whether the obtained RGB value exists in the RGB data set: If the obtained RGB value exists in the RGB data set, the operation status of the LED light is normal; If the obtained RGB value does not exist in the RGB data set, then the actual voltage value of each light-emitting unit of the LED lamp corresponding to the RGB value and the actual thermal current corresponding to each light-emitting unit are obtained, and the actual thermal current is collected by the thermal diode corresponding to each light-emitting unit of the LED; The actual voltage value of each light-emitting unit of the LED lamp corresponding to the RGB value and the actual thermal current corresponding to each light-emitting unit, as well as the test voltage value of each light-emitting unit of the LED corresponding to the RGB value and the test thermal current corresponding to each light-emitting unit of the LED collected by the thermistor when heating are performed for fusion analysis to obtain the LED lamp operation evaluation index; If the LED lamp operation evaluation index is less than the set LED lamp operation threshold, the LED lamp is operating normally. If the LED lamp operation evaluation index is greater than the set LED lamp operation threshold, the LED lamp is operating abnormally.

5. The LED lamp application method based on the common anode negative voltage circuit according to claim 4, characterized in that: The calculation formula of the LED lamp operation evaluation index is: YpZ=ln(1+β1*f(B1, B2)+β2*f(C1, C2)); Wherein, YpZ is the LED lamp operation evaluation index, B1 is the actual voltage value, B2 is the test voltage value, f(B1, B2) is the calculation function of the actual voltage value and the test voltage value, β1 is the weight factor of the value of the calculation function f(B1, B2), C1 is the actual thermal current, C2 is the test thermal current, f(C1, C2) is the calculation function of the actual thermal current and the test thermal current, β2 is the weight factor of the value of the calculation function f(C1, C2); Wherein, Rv is the actual voltage value of the R light-emitting unit, RvC is the test voltage value of the R light-emitting unit, δ1 is the voltage deviation weight factor of the R light-emitting unit, Gv is the actual voltage value of the G light-emitting unit, GvC is the test voltage value of the G light-emitting unit, δ2 is the voltage deviation weight factor of the G light-emitting unit, Bv is the actual voltage value of the B light-emitting unit, BvC is the test voltage value of the B light-emitting unit, δ3 is the voltage deviation weight factor of the B light-emitting unit, and ΔPV is the allowable value of the deviation voltage; In the formula, Rw is the actual thermal current corresponding to the R light-emitting unit, RwC is the test thermal current corresponding to the R light-emitting unit, γ1 is the thermal current deviation weight factor of the R light-emitting unit, Gw is the actual thermal current corresponding to the G light-emitting unit, GwC is the test thermal current corresponding to the G light-emitting unit, γ2 is the thermal current deviation weight factor of the G light-emitting unit, Bw is the actual thermal current corresponding to the B light-emitting unit, BwC is the test thermal current corresponding to the B light-emitting unit, γ3 is the thermal current deviation weight factor of the B light-emitting unit, and ΔPW is the allowable value of the deviation thermal current.

6. The LED lamp application method based on the common anode negative voltage circuit according to claim 4, characterized in that: If the LED lamp operation evaluation index is less than the set LED lamp operation threshold, the LED lamp is judged to be operating normally, and the brightness value of the LED lamp in actual use is obtained. The corrected brightness interval is obtained based on the change of the photosensor current, and the RGB value corresponding to the brightness value of each LED lamp in the corrected brightness interval is obtained. A corrected RGB data set is established, and the LED lamp normal operation database is updated based on the photosensor current, the corrected brightness interval and the corrected RGB data set.

7. According to the LED lamp application method based on the common anode negative voltage circuit of claim 1, the LED lamp comprises a common anode negative voltage LED, a switching power supply, a controller and a collection module, wherein: The positive electrode of the common anode negative voltage LED is connected to a switching power supply and a controller respectively, the switching power supply is used to supply power to the positive electrode of the common anode negative voltage LED, and the controller is used to control whether the positive electrode of the common anode negative voltage LED is connected to the switching power supply; The cathode of the common anode negative voltage LED is connected to the switching power supply and the controller respectively, and the controller is used to control whether the cathode of the common anode negative voltage LED is connected to the switching power supply; The acquisition module is used to collect the light-sensing current and the heat-sensing current of each light-emitting unit of the common-anode negative-voltage LED.

8. The LED lamp application method based on the common anode negative voltage circuit according to claim 7, characterized in that: The acquisition module includes a photodiode and a thermistor. The photodiode is used to acquire the photosensitive current of each light-emitting unit of the common anode negative voltage LED, and the thermistor is used to acquire the thermal current of each light-emitting unit of the common anode negative voltage LED.

Images